Engine



4 Sept. 1, 1936. J. w. HATFIELD 2,052,765

1 ENGINE Filed Oct. 16, 1934 4 Sheets-Sheet 1 I nventm' J W. Haw/6M;

' Attofney p 6- J. w. HATFIELD 2,052,765 7 I ENGINE Filed Oct. 16, 1934 4 Sheets-Sheet 5 hillhm Inventor Att e' Sept. l,- 1936.

J. W. HATFIELD ENGINE Filed Oct. 16, 1954 4 Sheets-Sheet 4 Inventor Attorney Patented Sept. 1, 1936 units! s aTEsP ATEN I E r Y i I 2,0523%: l .ENGINEV g Jaso n w, Hatfield, Denver, 0010.

7 1' tpplication fictober16,1934, Serial 1%. 748542 '1c1ai 11. 1.23 14) The present. invention-relatesto' new and useful improvements in internal combustion engines of the-rotary type'and has for one of its important objects to provide, in a manneras herein- Other objects of theinvention are to provide a'rotary internal combustion engine which will be comparatively simple in construction, strong, durable, highly efiicient and reliable in operation, compact and which may be manufactured at low cost.

All of the foregoing and still further objects and advantages of the invention will become apparent from a study of the following specification, taken in connection with the accompanying drawings wherein like characters of reference designate corresponding parts throughout the several views, and wherein:

Figure 1 is a View in vertical longitudinal section with parts shown in elevation through an engine constructed in accordance with the present invention, taken substantially on the line I-I of Figure 2.

Figure 2 is a view in vertical transverse section with parts shown in elevation, taken substantially on the line 22 of Figure 1.

Figure 3 is a vertical transverse sectional view, with parts shown in elevation, taken substantially on the line 3-3 of Figure 1.

Figure 4 is a detail view of the rotor.

Figure 5 is a view in plan of the inner portion of the block.

Figure 6 is a detail view partly in section and partly in elevation, showing one of the spring pressed slidable abutments.

Figure 7 is a view in vertical transverse section, taken substantially on the line 1-1 of Figure 1.

Referring now to the drawings in detail, it will be seen that the embodiment of the invention which has been illustrated comprises a casing I, said casing being open at one end and closed at its other end, as at 2. Suitable supports 3 are provided for the casing I.

Extending longitudinally through the casing I is a shaft 6 having fixed thereon a rotor which is designated generally by the reference numeral 5, said rotor being operable in the casing I and including a head 5 and a skirt 1. The head 6 of the rotor 5 has formed therein a circumferentially elongated pocket 8 which is preferably of substantially the shape shown to advantage in 'Figures 2 and 4 of the drawings.

Mounted in the skirt I of the rotor 5 is a cylindrical, stationary block 9 which may be mounted on any suitable supporting means, as- 5 at Ill. The shaft 4 extends rotatably through the block 9, as illustrated to advantage in Figurel'of the drawings. r

:r-The blo'ck'9 has formed therein a. cylinder I I in which connected-pistons I2 are mounted for reciprocation. It will be noted that the pistons I2 are arranged on opposite sides of the shaft 4. Fixed on the shaft 4 is a cam I3 which actuates the pistons I2. Ports I4 are provided in the casing I for communication with the ends of the 15 cylinder I I. The ports I4 are for the introduction of fuel from a suitable intake manifold (not shown) into the opposite ends of the cylinder II, as indicated by the arrows in Figure 1 of the drawings.

Formed in the casing I are compression chamhers I5 with which the pocket 8 is brought into communication as the rotor 5 rotates. The reference numeral I6 designates conventional spark plugs which fire the charge in the compression 25 chambers I5, the current to said spark plugs being controlled by a suitable timer H which is driven by the shaft 4.

Compression chambers I5 receive the charge from the cylinder II through a circumferentially 30 elongated port I8 in the skirt portion 1 of the rotor 5. The skirt portion I of the rotor 5 is also provided with a circumferentially elongated intake port I9 which controls the passage of the fuel into the ends of the cylinder I I. 35

The reference numeral 20 designates springpressed abutments which are slidably mounted in the casing I and which are adapted to ride on the periphery of the rotor 5 and engage in the pocket 8. The casing I also has formed therein 40 discharge ports 2I with which the pocket 8 is brought into communication as the member 5 rotates. Suitable rings 22 are provided for preventing leakage between the casing I and the rotor 5 and between said rotor 5 and the block 5 9. The walls of the cylinder II are chambered, as at 23, to accommodate the cam I3.

Briefly, the operation of the engine is as follows:

As the shaft 4 rotates with the rotor 6, the cam r0 I3 actuates the pistons I2 in the cylinder II and the fuel charge is alternately admitted to the opposite ends of said cylinder II as the opening I9 comes into communication with the intake 'ports I4. Then, as the opening I8 communicates 55 with a compression chamber l 5 the charge, under pressure, is discharged thereinto. It will be observed that the pocket 8 comes into communication with one of the compression chambers I5 substantially simultaneously with the opening l8. At this point the charge is ignited for driving the rotor 6. As the pocket 8 comes into communication with a port 2| the spent charge is exhausted. During the travel of the opening l9 between the intake ports I a partial vacuum is created in the end of the cylinder II which is about to intake, thus accelerating the entrance of the charge. During the travel of the opening I8 between the compression chambers lithe charge in the end portion of the cylinder l I which is about to be discharged therefrom is being compressed.

It is believed that the many advantages of an engine constructed in accordance with the present invention will be readily understood, and although a preferred embodiment of the invention v is as illustrated anddescribed, it is to be understood that changes in the details of construction and in the combination and arrangement of parts chambers therein and. further having intake and or exhaust ports therein, .a shaft extending rotatably through said casing, a rotor fixed on said shaft and operable in the casing, said rotor including a skirt, a stationary block mounted in said skirt and encircling the shaft, said block having a cylinder extending diametrically therethrough, the shaft traversing the cylinder, a pair of spaced, connected pistons operable in the cylinder on opposite sides of the shaft, a cam fixed on said shaft for actuating the pistons, the skirt having an opening therein for alternately establishing communication between each of the intake ports and the end of the cylinder associated therewith and said skirt further having an opening therein for "altemately establishing communication between 'each of the compression chambers and the end of the cylinder and associated therewith discharging fuel into said chambers, said rotor having a pocket therein for alternately establishing communication with each of the compression chambers and each of the exhaust ports, slidable abutments mounted in the casing and successively engageable in the pocket, the respective compression chambers being positioned remote from 7 its associated discharge ports and the abutments -.separating each compression chamber from the exhaustports of the other chamber, and means ;for igniting the fuel in the compression chambers when the pocket is in communicationtherewith.

JASON w. HATFIELD.- 

